python - 无法分配“HR”:“Employee.department”必须是“Department”实例

当我尝试感觉部门字段显示此错误时。
我不明白此错误..请帮帮我

Cannot assign "'HR'": "Employee.department" must be a "Department" instance.

这是我的模型

class Department(models.Model):
    name = models.CharField(max_length= 20,null=True)
    def __str__(self):
        return self.name
class Employee(models.Model):
    employee_name = models.CharField(max_length= 20, null=True)
    surname = models.CharField(max_length= 20, null=True)
    address = models.CharField(max_length  = 50, null=True)
    qualification = models.CharField(max_length = 30,null=True)
    contact_num = models.IntegerField(null=True)
    department = models.ForeignKey(Department, on_delete=models.CASCADE)
    def __str__(self):
       return self.employee_name

这是我的form.py

class AdForm(forms.ModelForm):
    employee_name = forms.CharField()
    surname = forms.CharField ()
    address = forms.CharField ()
    qualification = forms.CharField ()
    contact_num = forms.IntegerField ()
    department = forms.CharField()

    class Meta:
       model = Employee
       fields = ('employee_name',
                 'surname',
                 'address',
                 'qualification',
                 'contact_num',
                 'department')

这是我的view.py

def create(request):
   if request.method == 'POST':
       form = AdForm(request.POST)
       if form.is_valid(): #getting error on this
           form.save()
           return HttpResponseRedirect(reverse('employee-list'))
   else:
       form = AdForm()
   return render(request, 'employee/create.html', {'form': form})

最佳答案

department模型上的Employee字段是ForeignKey字段，但是在AdForm中将其定义为CharField。

您可以在表单中修复字段定义。另外，您也可以简单地删除显式字段定义。使用模型表单时，Django将为您选择正确的字段类型。

class AdForm(forms.ModelForm):
   class Meta:
       model = Employee
       fields = ('employee_name',
                 'surname',
                 'address',
                 'qualification',
                 'contact_num',
                 'department')

这会将部门字段呈现为<select>小部件，使您可以从（现有）部门中进行选择。

关于python - 无法分配“HR”:“Employee.department”必须是“Department”实例，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/51019461/